Brace for wrench-jacks.



W. B. DAUGHERTY.

BRAGE FOR WRENGH JAUKS.

APPLIOATION FILED. 00m. 2a, 1908.

917,928. Patented Apr. 13, 1909.

gnmm Caz adapted to be applied or mounted upon the sary to permanently fix or attach the circle WARREN B. DAUGHERTY, OF SAN LUIS OBISPO, CALIFORNIA.

BRAOE FOR WRENGH-J'AGKS.

Application filed October 26, 1908.

Specification of Letters Patent.

Patented April 13, 1909.

Serial No. 459,547.

T all whom it may concern:

Be it known that I, WARREN B. DAUGH- ERTY, a citizen of the United States, residing at San Luis Obispo, in the county of San LuisObispo and State of California, have invented a new and useful Brace for rench- Jacks, of which the following is a specification.

This invention has relation to braces for wrench jacks, and it consists in the novel construction and arrangement of its parts, as hereinafter shown and described.

Wrench jacks as usually employed for well-drilling purposes, consist of a circle platform of the derrick, and upon which is slidably mounted a pawl block which is adapted to pass over a series of teeth provided upon the circle. An actuating bar is pivot-ally connected with the said block and the circle is provided at one point with a stop adapted to limit the movement of one wrench applied to the drilling tool while the said block is adapted to actuate the other wrench applied to the drilling tool.

The brace which forms the subject matter of the present invention is adapted to be used in connection with a wrench jack as above described and is adapted to be inter posed between the drilling tool and the inner side of the circle, whereby the said circle is prevented from springing toward the tool as the parts thereof are being tightened up. By providing such a wrench it is not necesto the platform of the derrick, as the said circle is positively held against lateral movement when the ack is in operation by the said brace, and consequently when the jack is not being used all the parts thereof may be removed from the platform of the derrick, thus leaving an unobstructed surface.

The brace includes two members which slidably and adjustably engage each other, one of which is in the form of a socket, and is provided with a handle, while the other is in the form of a bar having at one end a serrated recess for engagement with the side of the drilling tool. The socket member is provided with a shouldered extremity, which is adapted to engage the inner side of the circle of the wrench jack. Thus, in addition to providing a brace between the circle and the drilling tool, a longitudinally extensible l brace is provided and which may be quickly adjusted to be applied to the parts of the jack as described where wrenches of diflerent lengths are employed.

In the accompanying drawings :-Figure 1 is a perspective view of the brace applied to a wrench jack. Fig. 2 is a longitudinalsectional view of the brace.

The wrench jack consists of the circle 1, which is provided at one end portion with a stop 2, and upon its up or surface with a ratchet 3. The inner anc outer sides of the circle 1 are grooved as at a, and the block 5 is provided with the flanges 6, which enter the said groove 4. The pawl 7 is carried by the block 5 and is adapted to engage the teeth 3 of the circle 1. The actuating bar 8 is pivotally connected with the block 5 and is adapted to operate the pawl 7. The jaws of the wrenches 9 are ap lied to the joints of the drilling tool 10, and the shank of one of the jaws 9 is ada ted to lie against the stop 2, while the shan of the other wrench 9 lies against the end portion of the block 5. It is obvious that by swinging the bar 8 the pawl 7 will be forced into successive engagement with the teeth 3 provided upon the circle 1, and that the shank portions of the wrenches 9 will be brought together, whereby the joints of the tool 10 will be turned into proper engagement with each other. As above stated it is preferable that the circle should be loosely mounted u on the platform of the derrick, and, in or or to prevent the said circle from having a tendency to slip or move toward the tool 10, during the jacking operation, the brace 11 is interposed between the inner side of the circle 1 and the drilling tool 10.

The brace 11 consists of the socket member 12 and the bar member 13, which is adapted to fit and slide within the said socket member 12. The member 12 is provided with a handle'le at one end portion and at its opposite end with a shouldered extremity 15 which is adapted to be inserted in the inner groove 6 of the circle 1. The member 12 is provided with a series of perforations 16. The member 13 is provided at one end with an enlarged head 17 which in turn is provided with an arcuate recess 18. The face of the said recess 18 is provided with the serrations 19 which are disposed longitudinally with relation to the arc of the said recess. That end ortion of the member 13 opposite to the en( thereof Which is provided with the recess 18, is provided with a I perforation 20, which is adapted to be rought into register with any one of the perforations 16, and when in such position the pin 21 is passed transversely through the registering perforations l6 and 20, thus providing means for increasing or decreasing the length of the brace 11 as an entirety. By such means for adjusting the length of the brace, the said brace may be applied to a wrench jack as described irrespective of the length of the shanks of the wrenches.

It is obvious that when the brace is c plied as described that the circle 1 will Se 1eld against lateral movement toward the drilling tool, and that inasmuch as the said circle is not permanently attached to the platform of the derrick, the parts of the wrench jack may be removed from the plat* form when not in use, that end of the member 13 which is provided with the enlarged head 17 is slightly chamfered, so that the brace may be driven down into position between the circle and the drilling tool, and when so positioned cannot slip as a consequence of the thrust strain applied to the same when the jack is being operated.

Having described my invention, what I claim as new, and desire to secure, by Letters Patent, is

1. A brace for wrench acks comprising a socket member having at one end portion a handle and at its opposite end a shouldered extremity, a bar member slidably engaging the socket member, said socket member having a series of erforations, said bar member having a perforation, a pin adapted to pass transversely through reglstering perforations of the said socket and bar members, said bar member having at its ends a serrated recess.

2. A brace for wrench jacks comprising a socket member having at one end a shouldered extremity, a bar member slidably engaging the socket member, means for fixing the bar member with relation to the socket member, said bar member having at one end an enlarged head, said head being chamfered and being provided with an arcuate recess having serrations extending in alinement with the arc of the said recess.

In testimony that I claim the foregoing as my own, I have hereto aflixed .my signature in the presence of two witnesses.

WARREN BRIGGS DAUGHERTY.

Witnesses:

CHARLES F. WRIGHT, E. C. KNIFFIN. 

